A mental disorder or a mental illness refers to a change in behaviour that’s generally associated with distress or disability, behaviour that is not considered ‘normal’ in society. They are usually connected to functions of the brain and other parts of the nervous system. Diagnosis of these disorders is particularly difficult because they are in many cases continuation of normal everyday issues like stress. Common mental health disorders include depression, generalised anxiety disorder, panic disorder, obsessive-compulsive disorder, post‑traumatic stress disorder and social anxiety disorder, Alzheimer’s, Parkinson’s, Schizophrenia, etc. There are various causes for mental disorders, including genetic predisposition and environmental factors.